Railway-traffic-controlling apparatus



Sept. 2, 1930. H. s. Looms RAILWAY TRAFFIC CONTROLLING APPARA'ItU 3INVENTOR: 7

#44 ATTORNEY Filed June 3, 1926 I I progress-07f thetrainfi" HAR LDS.Loom/us, 0F WILKiNsminer;v PENNSYLVANIA, ,AssIGNtiR T0 THENNIQNPENNSYLVANIA AIL AY-hiking ;c oNmpLm q ANPARANUS e Y "app aud; file 3,

1 My invention relates to reilwayjt rafficbontrolling apparatus,and'particumrly to ap ,paratus 0-f the type comprising. devices .10-

dated inthe trackway adapted "to compel late with train carried meanstobdntrql the treliliearrieclapparatus is notil'lustratedbecause-deforms no" artfof' m'y finventio'ne.

More particularly myinventiqiiii'elefpe fie eans for checking theeir-cuits'o f th trackfw'a'y "devices in 's 'ch appammeqm willdeseribegoneform of tfackway apt fpalr itus embodying niyiriventiofi,and then pdii1tf0ut the novel-features inclgfinisyj "L-T e ac mp y ng dw g s a i g a matic View showing one 'fOrm j of treckway apparatusembqdying'myinve tion. Referring to "the drawing, referenee' charaepers1 and l? designatejihe tra'ek rails of a stretch ef railway track which'iS di ided "'r ii'lto sections A415, B e-Q; etc.', by'fmeans;

f. ips 'ulated j oinps' 2. Eaeh section. is eupplied with track circuitcurrent from fa; "suitable'sbureefsuehas ai'batteryBL Coii'fiec'tedSWITCH &. SIGNAL G MPANY, OF sW'vIssv'AL'E, PENNS LVANI JA-eoBPoRATIoN'01]" d-icatior i is giveniori 'a'trainipasing'anink, 3 oluctor wlth itswlndmg' 5 open c1 'c1i1tecl,but v no effect is produced on a passingtrain when I "the Circuit of th fwinding i closed; The

[Preferably the tree i vayfinductorffor each sl'eet ion is lbcated inthe rear o f'theentrance 7 of the *ai'ssoeiete'cl section by re distanceequal; 1:0 the distance required-i to bring a; train hevi g lengest,bmkii 'g' clista'n'ce' from the; I V -'highes t permissivespeed to afull stop.

;--, The windi 'sef eachindi ctoi'lKnfofms j a part of; abempletely'iselatedcircuit includ jfiselated? I'meanthat nd part 0% theinductor circuit is fag anytime, eleeti icallytconneeted I hwlth anyQtl1erelrc ut. hen'ei erfa; linefre-u H is energized the winding 5 (ifthefajssocialted 'indiict'q K is close circuit'edi "1 E fjthliojiighweircuitfrom battery G frent' eenreferencec'hai aeter R 'Withan expofie'nt jftrdkweysigiial designated theiefei' "-fjf hichi951lacecl adjacen heeentr'amei i I 5 [designated bygthe;1}eiefeiic'echaracterKwith "sigI itl" lndicatef prbc'ee or'cutiongbiitfnot:

' adapted-to col-operate w th tmmparmedep;

T17c6t-he track railsxof'eaeh seetion heaflihefiftabtisiqf' wife9,iwilidin'g ilwire 1 entrance end islar it rackileyfdesigpated"by"; f6;ireltyf'J gu df ire 7, ap 1;0 jbMt' Kyi A I 'Ihduetdn"Kiwill"thenpreduceln 0fefieet011 i Y r j 'ctifrespen'cliii'g fte't'helocation; Associated I ep'aseil'igftragin, gbutf-ifrelay H is 'd'een'er f with each track relay Bis alirie relay desige gized, thelbrakes; Will/be applied 01'- a stop 'n'clicatien will b'e' "givenifon'a; train; passing 7 n a wi d fii i the I Adjzicei prthe el t rance endOf" se citi on I alsqprOVidej a tm kwa 'llldliQtOI that theuse of acompletely isolated inductor 1 circuit prevents the inductor windingfrom) tery P throughjwires lOaand l5, contact 16 cates either proceed orcaution. a, r Eachsignal i s provid'e'd with acaution circuit andaproceed circuit, The caution circult for signalS for example, 1s frombatof relay RB, wire 28,back contact l7v-1 8 of RBfWire QS,frontIcontactll-QQ ofrelay H I proceedcircu-it-for signal S is frombattery SP3, through wires 10 and 15, contact 16" of tem. s.

Asshown in the drawing, thesection to the I .;,right ofpoint .Cvisoccupied byfa train indi- 'cated'diagrammatically at V. ,Relay RFli-s,therefore, de-energi'z'ed f and contact 16'jhas Open-ed both the'caution'and'proc'eed circuits for,signals which, therefore-, indicatessto ,Contact'vl3 isjopen' so that mayne is def open circuitedby openingof commas; Contact 11 of relay R isopen, so that linerelay H isde-energized, inductor: K is open cirqshould. become displaced, so as tobreak a wire, forexample, wire 6, relayJ would be de-energized andcontact 2023, of'relay J would open both the proceed and caution cira.stop indication; s It will also be obviousisithe inductor, acircuit forsaid inductor wind relay J wire 21-, Signals, and wire 14 back tobattery P This caution circuit is closed when track relay R is energizedand relays J 'and H3 are both de-energized.v Each sigi. nal S, also hasan auxiliarycaution circuit 20:

whichis closed only when the signal indicates proceed. 1 This circuit isfrom batteryP through-wires 10 and 15,, contact 16015 relayfrontcont'act 20 -23lof relay J wire 21, signal-S and wire 14, back tobattery P The relay: R ,"l wire 28,front contact-1722 of relay H frontcontact {2023 of relay J wire 24, "front contact '25 of relay HB, wire26,

signalSFf and; wire 1 Lv back to. battery P Thisp-roce'edcircuitisclosed only when re-, lays J and H are both energized. V

; WVhen relay He-isgenergizedfif -n'ductor K cuits' for signal S whichwould therefore give being close circuitedby', aground in the'sysenergized", and winding '5, of inductor: K is cuited at contact 8ofgrelay 1-1 and signal I SB" indicates aution; j RuayeR Jeane all nbeing energizedilsignal S indicatesaproceed andth'e circuit for inductorK isclosed. V

1.'.-.;I,"wi1l now assume thatgatrain equipped with automaticcontrolling apparatus enters 7 1tl1e,stretch ;of track shown in thedrawing,

proceeding fromleft to right. I hetrain passes'the'inductor Kjthe 4-55train carried apparatus'will, not be affected I be made since thewinding 5 is open circuited by open contact 8 of, relay H If the traincontinues past the inductor K it will receive a second brake applicationbecause the wind- 7 ing 5 of inductor K is also open: circuited;

v If anopen circuit or a break should occur in winding 5 of inductor Korin any part of its circuit, a train approaching polnt A would incu r abrake" application as it passed the inductor K5. Such a break, however,would causede-energization of relay J A thus opening front; contact 2023of this relay and causing the signal S to indicate stop,

Whi'ch in turn would cause the signal next in therear to indicatecaution because circuit controller L wouldbe open. It will thus, be seenthat a signal canmnever indicate pro-- ceed. with the associatedtrackway inductor "open circ'uited-L Although I have shown and describedbut one form of trackway apparatus embodying my'invention, it isunderstood that various changes and modifications may be made thereinwithin the scope of the appended claimswithout departing from the spiritand scope ofmy invention. a

- Having thus described my invention what I claim is 1. In a railwaytraiiic controlling apparatus, the combination with a section of track Iand a t'rackway signal, of a track relay connecteditothe section, a linerelay having a backco-ntact and a plurality of front contacts andjointly controlled by the track relay of the adjacent section and thesection next in advance, a trackway inductor, a winding on ingincludingachecking relay and a front contactof said llnerelay, said checkingrelay having, a front and a back contact, a caution circuit for thesignal including a back contact offlthe checking relay and abackcontactof'the' line relay, and a proceed circuit for the signalincluding the front contact ofthe check'ingrelay and two front contactsof the line relay; e i v 2.'In1c0mbination, a plurality of sectionsoffrailway track, a track relay associated witheach'section, a signalcapable of giving ..a more or :less restrictive indication dependinguponatrafiic' conditions in advance, a

trackway iinductor for the automatic control by the track relay. of thesection'in, advance,

and means operative only when the checking and line relays are energizedto cause the, signalto give one indication, and when both are Idej-energ zed to give another indication.

:3. in combination, a section of railwaytrack, a trackway signal capableof giving a infore-or less restrictive indication depending g v acircuit forsaid inductor including a check-Q Q ing relay, a line relay,af source of current upon traflic conditions in advance, a trackw ayinductor for the automatic control of trains,

for energizing the line relay, and means operative only'vvhen both ofsaid relays are energized to cause the signal to give one indication andwhen both are de-energizedto give another indication; r I

4. In coinblnatlon a section of railway track, a trackWay signalcapableof giving a 7 more or less restrictive indication depending upontraffic conditions'in advance, a trackway 7 inductor, a Winding onj-theinductor, a checking relay and asource of current in series HAROLD-LOOMI S.

